The 25-million-year-old cavities have perplexed people for decades.

Concrete spud looks like the North American Sebago.

Giant fruit signaling the entrance to a tropical paradise.

The longest fence in the world stretches over 3,000 miles to keep the dingoes out.

There's nothing shrimpy about the world's largest artificial prawn.

A massive metal lobster welcomes tourists to a roadside restaurant.

One of the oldest theaters in Australia, it's also said to be haunted by a performer who died on stage.

One of Australia's famed "Big Things," this giant fruit was once stolen as part of a publicity stunt.

These sea cliffs are an epic natural wonder.

An indigenous ethnobotanist runs this brunch spot celebrating Australia’s native flavors.

Dozens of large-scale, creative, evocative curios from prominent artists dot the calm outdoor space around this major museum.

Granite rocks that concentrate waves into powerful jets.

A granite waterfall cascading down is one of the highest multi-tiered falls in the state.

A giant Australian fruit and tropical farm.

One man's artistic vision is a small town government's legal battle.

This massive water spout has been luring visitors for hundreds of years, some to their death.

A wonder of natural limestone formations etched by millions of years of natural interaction between rainfall and rock and air.

An abandoned marine theme park has created a difficult experiment in dolphin rewilding.

White cockroaches and other cave species occupy this massive series of lava tubes.

This historic observatory contains the world's oldest refracting lens telescope.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

The largest collection of medicinal plants in Australia is also home to a witch who will show you how to use them.

This extraordinary geological oddity resembles human-made pavement.

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.